Moved or removed unused variables

Some variables were either unused or only used in certain contexts,
like debug or tracing, so these were either removed (when unused)
or moved to the right scope (when used conditionally).
Also fixed a string format warning and a missing case warning.

Change-Id: I2d130faa992b5dc06fb332d7404a8aebc7c121ef
Reviewed-on: https://swiftshader-review.googlesource.com/5462
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Store EGL images in a namespace.

This allows validating the EGL image handles. It also ensures that on 64-bit
platforms the handles fit in 32-bit so they can be exchanged through 32-bit
applications (e.g. on a 32-bit virtual machine).

Change-Id: Ie02b00edd2cf7fa02b38316ee7d21c22eae720b5
Reviewed-on: https://swiftshader-review.googlesource.com/5500
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Add the EGL display as a context member.

This prevents having to access the current display though TLS.

Change-Id: Ic93d0f88096a7e7e50318dbafb9b32da5fbc50a2
Reviewed-on: https://swiftshader-review.googlesource.com/5511
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Meng-Lin Wu <marleymoo@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Minor cleanups

A few minor things fell through the cracks of previously landed cls:
- Added missing ops from TOutputTraverser::visitAggregate
- Made sure some members were initialized in TIntermAggregate
- Removed UNIMPLEMENTED() for implemented feature

Change-Id: Iec139533714ad6288f2f3962873616b5578a0ceb
Reviewed-on: https://swiftshader-review.googlesource.com/5480
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Min LOD and Max LOD sampler parameters

Plumbing to send Min LOD and Max LOD from the Sampler
object in the Context to the Renderer's texture's state.

Change-Id: I6831a8e17d67e745d12a78176d566750d971ec76
Reviewed-on: https://swiftshader-review.googlesource.com/5510
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Meng-Lin Wu <marleymoo@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

LOD Base level and Max level to sampler state

Plumbing to send the LOD base level and max level from the Sampler
object in the Context to the Renderer's texture's state.

Change-Id: I5a9571f58a0cbaea8cedfb98da159672673eed94
Reviewed-on: https://swiftshader-review.googlesource.com/5501
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Texture size fix

I looked into the texture size issue and I removed the " + Int(1)"
used on the LOD and replaced it with "baseLevel", which I think makes
more sense. Without the "+1", some tests using baseLevel==1 fail, but
all tests pass when I use "+baseLevel". I'm not 100% sure why the
"+1" wasn't making tests that were using baseLevel==0 fail.

Note that, for now, the new Sampler::State "baseLevel" member will
always be 0, as the code to set it hasn't landed yet and will be in
another cl.

Change-Id: I8532bb7009abcc15e03416489f1d25027e336457
Reviewed-on: https://swiftshader-review.googlesource.com/5471
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Removed unused classes Vector4i and Vector4u

Change-Id: Ic170d391c2fb487af8c405df15b3bab585f64273
Reviewed-on: https://swiftshader-review.googlesource.com/5470
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fix the OpenGL ES 1.1 version string.

The 1.1.12 spec states that the string must have the format "OpenGL ES-XX N.M"
where XX is a two-character profile identifier, either CM for the Common profile
or CL for the Common-List profile, and N.M are the major and minor version numbers
of the OpenGL ES implementation, separated by a period (currently 1.1).

Bug 29072494

Change-Id: Ia7e55266c1cb1d24279f2e93f31d269f948dc647
Reviewed-on: https://swiftshader-review.googlesource.com/5490
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

texoffset implementation

Related deqp tests:
textureoffset
textureprojoffset
texturelodoffset
textureprojlodoffset
texturegradoffset
textureprojgradoffset

Change-Id: Id83abe3f24ec789345a9ce7dcf6e146e2410da3b
Reviewed-on: https://swiftshader-review.googlesource.com/5451
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Added missing include

The use of std::numeric_limits requires "#include <limits>" on Linux

Change-Id: I56b09e0e551a4f898406073d2d0f11b4dcc1fed5
Reviewed-on: https://swiftshader-review.googlesource.com/5464
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

New fragment output types

This code requires flat interpolation to work properly, but otherwise
R16I and R16U types should work properly with this code. Other enums
added here (remaining combinations of R/GR/ABGR, 8/16, I/U) aren't
implemented yet.

Change-Id: Ica4e29d0421611e3178a20aadc01f3645dc793bf
Reviewed-on: https://swiftshader-review.googlesource.com/5460
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Implement flat interpolation qualifier support.

By default vertex shader outputs/fragment shader inputs are
smoothly interpolated. The 'flat' keyword can be used to change
the interpolation to "flat", which basically means that no
interpolation is performed. "flat" is the only interpolation
qualifier accepted for integer types.

This change fixes all shaders/precision dEQP tests as well as a
few fragment output integer format types related tests.

Change-Id: Ic64b0ec40c705d885c255b3b671cf7460965dfee
Reviewed-on: https://swiftshader-review.googlesource.com/5390
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Update the architecture layers image.

Change-Id: Iccb3fcb70c99513ce7ffc75b14ec1887e5c21d40
Reviewed-on: https://swiftshader-review.googlesource.com/5441
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Fix image link.

Change-Id: Iae8548c3aa7379f043be3318e59ed39b531e2f07
Reviewed-on: https://swiftshader-review.googlesource.com/5440
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Add design documentation.

Change-Id: I22abf525f9389cf942c0b66b8c34c5446dd8d306
Reviewed-on: https://swiftshader-review.googlesource.com/5431
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Add architecture documentation.

Change-Id: Ie28d3e61fda6fa01f5dc669a4ef3f4c0b09743d0
Reviewed-on: https://swiftshader-review.googlesource.com/5430
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Use static_assert instead of meta macros.

Change-Id: Id1e3a50d56475c495a3cfb82553c5bd4c48a0fc3
Reviewed-on: https://swiftshader-review.googlesource.com/5425
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Implement floating-point conversion to the nearest representable integer.

Bug 20724899

Change-Id: I35f63709b5773c2cefe8bf2376e6d9236dfd81f9
Reviewed-on: https://swiftshader-review.googlesource.com/5090
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Remove snapping clipped points to the frustum plane.

Change-Id: Iad768d095695dd8b6130a745e6741b7029fa9649
Reviewed-on: https://swiftshader-review.googlesource.com/5424
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Support frustum clipping against z = -1.

This allows performing the depth range adjustment only once as part of the
viewport transform and not have it be affected by transform feedback.

Change-Id: I89fba3b131c234bea064b1b65f50b62261f4c307
Reviewed-on: https://swiftshader-review.googlesource.com/5421
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Refactor point and line clip flag calculation.

Move clip flag calculation for the new polygon vertices of points and lines
from the renderer to the clipper.

Change-Id: I41ac3647d8e9376586a1011d1cf28d83e9c963a2
Reviewed-on: https://swiftshader-review.googlesource.com/5423
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Refactor primitive setup functions.

Use a pointer to member function to not explicitly pass the renderer pointer.

Change-Id: Iaccc1d7a1833fbdb433c56063c89b6178e9e2333
Reviewed-on: https://swiftshader-review.googlesource.com/5422
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

texgrad implementation

Related deqp tests: texturegrad, textureprojgrad

Change-Id: I17529ed426c29bc1dec48fb7ac939c29caeeaf07
Reviewed-on: https://swiftshader-review.googlesource.com/5420
Tested-by: Meng-Lin Wu <marleymoo@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Treat unsized RGBA/RGB textures as renderable.

Bug 28929520

Change-Id: I94fcac3149fafd422e1879360109b668a2ca6029
Reviewed-on: https://swiftshader-review.googlesource.com/5410
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Enabling Transform Feedback

This cl enables transform feedback in Context by calling
Program::applyTransformFeedback(). It also adds the code
required to compute vertex offsets between different draw
calls, when multiple successive draw calls write into the
same transform feedback buffer(s).

Change-Id: Ib3bc4bdd1308486642f233f425d0088a55cb1333
Reviewed-on: https://swiftshader-review.googlesource.com/5301
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

VertexRoutine code for Transform Feedback

This cl adds the code that actually performs the copy of the
vertex shader outputs into transform feedback buffers. It
also contains a fix for symmetricNormalizedDepth, which must
be computed after the information was copied into the
transform feedback buffers, when transform feedback is active.

Change-Id: I418f94a15b9425bba0905c840f8cf4828233d0fb
Reviewed-on: https://swiftshader-review.googlesource.com/5172
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Loop count crash fixed

The loopCount function was expecting the left side of a binary op
to always be a symbol, which isn't necessarily the case, so a null
pointer check was added to prevent the crash.

Change-Id: I1fe6626bf52ecbb05664d1d2fa18f7ed830a7ee6
Reviewed-on: https://swiftshader-review.googlesource.com/5344
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Make the number of vertex inputs configurable.

Change-Id: Ic078acae24dd2b2361a32498b49238b98e0ac0d1
Reviewed-on: https://swiftshader-review.googlesource.com/5386
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Make the number of fragment inputs configurable.

Change-Id: I2c618c03d00718951907e81fcd600155751aac89
Reviewed-on: https://swiftshader-review.googlesource.com/5385
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Make the number of vertex outputs configurable.

Change-Id: I17ae53e5274232e9e3b482daac56d507788e822c
Reviewed-on: https://swiftshader-review.googlesource.com/5383
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Fix overwriting clip flags with varyings.

Previously the 12'th generic varying's w component would overwrite the
clipFlags member field.

Change-Id: I499979a2bbc653c0d95b35512a7a9e36667c2e4d
Reviewed-on: https://swiftshader-review.googlesource.com/5382
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Rename color output semantic.

Change-Id: Iaa6cf9367f291a4bc3bde899484ca323ff54a0d4
Reviewed-on: https://swiftshader-review.googlesource.com/5381
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Implemented the EGL_KHR_create_context extension

Implemented EGL_KHR_create_context as described here:
www.khronos.org/registry/egl/extensions/KHR/EGL_KHR_create_context.txt

A small part of it was already implemented, which was to add
support for the EGL_OPENGL_ES3_BIT bit in the EGL_RENDERABLE_TYPE
bitfield. Note that the EGL_OPENGL_ES3_BIT is explicitly disabled
on Android right now.

Change-Id: I10e6222511b29f2d91bd55bfeb0f39bc5b884f89
Reviewed-on: https://swiftshader-review.googlesource.com/5380
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Fix the CMake build for Linux.

Bug 27225594

Change-Id: Ice38ce8ca8ef157e24d309fe6ac9ce2f69e9e816
Reviewed-on: https://swiftshader-review.googlesource.com/5363
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Update version.

Change-Id: I47447de635055f9fadf43a71f5423e8fcba884aa
Reviewed-on: https://swiftshader-review.googlesource.com/5358
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Move Khronos OpenGL headers to top-level include directory.

Change-Id: If473b7d83e54ccdca710dffe353b539213ae2046
Reviewed-on: https://swiftshader-review.googlesource.com/5357
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Switch implementation

Implemented switch/case for glsl in OpenGL ES 3.0.
For simplicity, it is implemented as a loop without a condition,
so break statements work properly like so:

begin switch
  if(...) // 1st case
  ...
  else if(...) // other cases
  ...
  else // default case
  ...
end switch // Anchor point for break statements

All related dEQP tests pass, except 7 tests where vertex shaders
contain a switch or a loop within another switch. These 7 failures
have only about 5% of bad pixel and seem to be related to an issue
with int(floor(...)), since the equivalent tests inside the fragment
shader pass.

KNOWN ISSUE: If a switch is within a loop and one of the cases
             contains a "continue" statement, this will not be
             handled correctly at the moment. There are no dEQP
             tests for this at the moment, AFAIK.

Change-Id: I3ba34ab06a759d07e8520f6a87d75036a5cdaef5
Reviewed-on: https://swiftshader-review.googlesource.com/5272
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Added vertex attribute types

Added a few types:
- Half float
- 2_10_10_10_INT
- 2_10_10_10_UINT

Related dEQP tests pass.

Change-Id: I2fb04fee89c3d69367dc2e401ac53d9758add9bf
Reviewed-on: https://swiftshader-review.googlesource.com/5356
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Add missing license headers.

Change-Id: I093be383c0c5b111592acad4cc9301711c75ab88
Reviewed-on: https://swiftshader-review.googlesource.com/5362
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Add readme file.

Change-Id: I3aaf4819fa629282ebeb9f7e70fbae53c261c25d
Reviewed-on: https://swiftshader-review.googlesource.com/5355
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Output builds to top-level obj and bin folder.

Change-Id: I1444a3d15977c2617866f293e0ac0ccbd253d878
Reviewed-on: https://swiftshader-review.googlesource.com/5353
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Move Visual Studio solution to root directory.

Change-Id: Ifb474e6ab12b254599b6d1713f9f2a01b869e09d
Reviewed-on: https://swiftshader-review.googlesource.com/5361
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Fix CMake symbolic path and lower version requirement.

Change-Id: I7c854c0c357f480b0686b0ed12e371adca8a738f
Reviewed-on: https://swiftshader-review.googlesource.com/5354
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Copy d3d9.dll builds to lib directory.

Change-Id: Iea408eb9beb6aa3eec4d4e64a3bd34510411dfaa
Reviewed-on: https://swiftshader-review.googlesource.com/5360
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Disable all LLVM signal handlers.

This fixes issues on Android where applications use these signals in their
normal course of execution. The Mono C# framework uses SIGXCPU for garbage
collection, and ART uses SIGSEGV, SIGQUIT, and SIGUSR1.

Bug 27555932

Change-Id: I4977b8f0419da660a57a8eeef20a7fe747921a63
Reviewed-on: https://swiftshader-review.googlesource.com/5345
Reviewed-by: Greg Hartman <ghartman@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Remove MemoryManager.

Change-Id: I8158c0bb2c19d6cdee12a970f24785fae609d5fc
Reviewed-on: https://swiftshader-review.googlesource.com/5352
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Update D3DCAPS2 descriptions to match MSDN documentation.

https://msdn.microsoft.com/en-us/library/windows/desktop/bb172511(v=vs.85).aspx

Change-Id: I2bc8251bce77aacb55fbad1c677f865395f5a986
Reviewed-on: https://swiftshader-review.googlesource.com/5351
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Add authors and contributors files.

Change-Id: I192d8fe104c3734c9c37108312f1dc93470d8d9e
Reviewed-on: https://swiftshader-review.googlesource.com/5342
Reviewed-by: Shannon Woods <shannonwoods@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Add contributing instructions.

Change-Id: I9fe9bd339f2aacb04394259ee8753dbc8e041430
Reviewed-on: https://swiftshader-review.googlesource.com/5340
Reviewed-by: Shannon Woods <shannonwoods@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Fixed expected state when using different images for depth and stencil

When depth and stencil are both present, they must be the same image,
or return GL_FRAMEBUFFER_UNSUPPORTED, according to the GLES 3.0 spec,
section 4.4.4, Framebuffer Completeness.

Change-Id: I607c05617fb55743635eda987da6de523385d92b
Reviewed-on: https://swiftshader-review.googlesource.com/5262
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Apply the Apache 2.0 license.

Change-Id: I4a7aeefedcd2d891093520d5a10ebefadcddb5be
Reviewed-on: https://swiftshader-review.googlesource.com/5320
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Remove the watermark logo.

Change-Id: I72439a60850add0600face13c94cc481a7083792
Reviewed-on: https://swiftshader-review.googlesource.com/5221
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Move LLVM to /third_party.

Bug 28616401

Change-Id: Ia54134e6e1dc6b101c7f81d9047e9bcc9fab3061
Reviewed-on: https://swiftshader-review.googlesource.com/5311
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Move PowerVR samples to /third_party/PowerVR_SDK.

Bug 28616401

Change-Id: I888ac3dd3186206c7745c23a542b91510a461f45
Reviewed-on: https://swiftshader-review.googlesource.com/5310
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fix log2() accuracy.

Bug 28474248

Change-Id: I61bf28687623437c6b9b383dc189ffa28ad24c22
Reviewed-on: https://swiftshader-review.googlesource.com/5330
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fix validating the current context on eglSwapInterval.

Change-Id: I7f62eae32d2122ec14f400841eaefa3712cf582d
Reviewed-on: https://swiftshader-review.googlesource.com/5291
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fix validating sync object pointers.

The spec states that "If <sync> is not a valid sync object for <dpy>,
EGL_FALSE is returned and an EGL_BAD_PARAMETER error is generated."

Change-Id: I4bbd2ddfefd7baba9c301decb644bfb545e66f01
Reviewed-on: https://swiftshader-review.googlesource.com/5290
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

modf implementation

Implemented modf as trunc + sub
Passes all related dEQP tests

Change-Id: I43656c51a670d235153e5fac390a8db311b14f8d
Reviewed-on: https://swiftshader-review.googlesource.com/5280
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Importing log2f fix for JB-MR1

Bug 28474248

Change-Id: Id5b93f3494c918cb344e5da7010dfa48a25cdde1
Reviewed-on: https://swiftshader-review.googlesource.com/5263
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fix scoping of function parameters for GLSL ES 1.0

This reverts commit 0637eac3b8fd276596b303aaa7e5d59a3accccf8.
It's considered a spec bug:
https://cvs.khronos.org/bugzilla/show_bug.cgi?id=8656

Change-Id: Id49121d5adf91ecab3d261c3c12e2f879f47e856
Reviewed-on: https://swiftshader-review.googlesource.com/5192
Reviewed-by: Shannon Woods <shannonwoods@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Fix sampler-array-using-loop-index.html regression.

Change-Id: I1d1a716bd9bd5b636c5b263a7094ff13ac9aa549
Reviewed-on: https://swiftshader-review.googlesource.com/5260
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Use a wildcard for detecting GCE builds.

Change-Id: Iddd9acf8496abe4dfa147f8a59b4cfb2f23df3a7
Reviewed-on: https://swiftshader-review.googlesource.com/5261
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Transform feedback buffer assignment

This cl adds a utility function that assigns the correct buffer
for each linked transform feedback variable. All the information
about location and size is sent to the VertexProcessor for use
during rendering.

Change-Id: I942805250804f56805de1fc117024c20976e83a0
Reviewed-on: https://swiftshader-review.googlesource.com/5174
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Don't continue looping when having returned from shader function.

Previously we would mask instruction execution after hitting a LEAVE,
but still jump back on every loop iteration (even if infinite). This
change applies the enableLeave mask to the loop test condition so we
break out of the loop when all strands have hit LEAVE.

Change-Id: Ia331a91fb363d20743d5b87a468c3cfcaa7b481e
Reviewed-on: https://swiftshader-review.googlesource.com/5250
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fixed not equal folding

The not equal folding logic was wrong. It would end the loop
as soon as it found equal components, which was checking if
ALL components are not equal, but that's not how not equal
works, it should return true if ANY component is not equal.

I also refactored it because it was hard to follow, with the
boolNodeFlag variable being used upside down of the result.

Change-Id: I704f26f2fd31a1cc637f5d7601409de8161c5b80
Reviewed-on: https://swiftshader-review.googlesource.com/5211
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

SRGB implementation

The SRGB conversion code was already available, but wasn't used
specifically for the SRGB type framebuffers. Also, the SRGB
conversion should always be applied after blending.

According to the GLES 3.0 spec, section 4.1.8 - sRGB Conversion:
"the R, G, and B values after blending are converted
 into the non-linear sRGB color space by computing."

All related dEQP tests pass.

Change-Id: I9342d2f74aa650f28835a951bdfa8bd371bc6924
Reviewed-on: https://swiftshader-review.googlesource.com/5189
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Fix indexing of samplers in structures.

Change-Id: I0bde678865902d549d4260bf8f6c1a368a46f4d4
Reviewed-on: https://swiftshader-review.googlesource.com/5191
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Work around LLVM integer vector compare bug.

Change-Id: If90d45b5f0c83620486dd7b6decc2f0f5fc7e558
Reviewed-on: https://swiftshader-review.googlesource.com/5220
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Texture projection constant folding

Whenever texture projection is used with a constant texture
coordinate, folding allows to use the full precision reciprocal
and not generate the lower precision reciprocal operation.

Change-Id: I6cab6567d63ecd9abe1cedbd7e46e1fd9099a3d3
Reviewed-on: https://swiftshader-review.googlesource.com/5210
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

More constant folding

Added constant folding for:
rad, deg, sin, cos, tan, asin, acos, atan, sinh, cosh, tanh,
asinh, acosh, atanh, log, log2, exp, exp2, sqrt, inverstsqrt

Change-Id: Ifc6b089e5981da9a3739d4ed7636953a682ce220
Reviewed-on: https://swiftshader-review.googlesource.com/5200
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Struct equality comparison fixed

There's an LLVM bug currently that prevents us from using ICMP_EQ,
but ICMP_NE works fine, so the "equality" test has been changed to
"!inequality" to fix the issue. The fix should be reverted once
LLVM is updated to a version where the ICMP_EQ issue is fixed.

Change-Id: I79d6ca99554317cc64ffa2905ae2804bd4805e2a
Reviewed-on: https://swiftshader-review.googlesource.com/5193
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>

Fix implementation read format for RGB formats.

Bug 27690616

Change-Id: I28b62fc56b0b572c1c9e94499d8a0c4c56737f3c
Reviewed-on: https://swiftshader-review.googlesource.com/5190
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fix operator precedence issue.

Addition evaluates before the ternary operator, which resulted in the wrong
sizes being computed.

Bug 28346104

Change-Id: Id28843132097a4fb1599eed19c05f479f16f1315
Reviewed-on: https://swiftshader-review.googlesource.com/5187
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Fix unrolling loops with return statements.

Change-Id: I8974a6bb4137d1dfad9f5dd3a92cc9306c38294c
Reviewed-on: https://swiftshader-review.googlesource.com/5184
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Support parsing defined operator generated by macro expansion

dEQP tests enforce that the defined operator should be parsed even when
it is generated as a result of macro expansion, even though this is
undefined according to the C++ preprocessor spec.

Implement support for this by putting the parsing for the defined
operator inside MacroExpander. The operator gets processed right after
it is generated by macro expansion. Parsing the defined operator is
toggled with a boolean according to the context where MacroExpander
is used.

Change-Id: I8557e829f4278ab6cb27eb4a0f84ca0c0dd18d1a
Reviewed-on: https://swiftshader-review.googlesource.com/5182
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Unexpected tokens after conditionals should be an error instead of a warning.

Change-Id: I49d6d36ecf9a5f0d3d333422b3e4970192617c05
Reviewed-on: https://swiftshader-review.googlesource.com/5180
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Validate that all function-like-macro arguments are unique.

Change-Id: Idc8c2a241af91916857ba015b061ce655b33e866
Reviewed-on: https://swiftshader-review.googlesource.com/5179
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Fix potentially uninitialized variable warning.

Change-Id: I29172c0c5423750db2665c350746b82fd2a34653
Reviewed-on: https://swiftshader-review.googlesource.com/5181
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Making proper use of size_t

In a lot of cases, int was being used instead of size_to represent
sizes. That led to some warnings about inconsistencies between int
and size_t usage. While this cl doesn't solve all warnings, it tries
to use size_t and int where it should be appropriate to use them.

Change-Id: Id760df1360f65b2bba60f4075cdf4954fc6bbaf3
Reviewed-on: https://swiftshader-review.googlesource.com/5177
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>

Fix error code on invalid shader/program operation

The spec states that GL_INVALID_OPERATION is generated when a shader or
program function is called on the wrong object type. GL_INVALID_VALUE is
generated when there's no shader nor program object by that name.

Change-Id: Id9d922b390ca5d2db233eb60b6a44992105cb933
Reviewed-on: https://swiftshader-review.googlesource.com/5176
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fix checking all mipmap levels for padding.

When textures have padding after a row of pixels, we can't use the sampler's
fast path which uses shift operations. We have to treat it as an NPOT texture.
Previously only mipmap level 0 was checked for padding, but when a texture is
also a render target we allocate 2x2 pixel blocks so a 1x1 mipmap has stride 2.

Change-Id: I7421fddbe5ed0d330d881f09c2161d9c42348600
Reviewed-on: https://swiftshader-review.googlesource.com/5175
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Transform feedback varying validation code

Proper validation of varyings used for transform feedback was added.
Simple types, as well as arrays and array elements are allowed.

Change-Id: I83ceb5eb19bf5691264ab0e142c3cc6a7debda4c
Reviewed-on: https://swiftshader-review.googlesource.com/5058
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Compute cube LOD from 3D cube intersection distance.

We used to compute the cube map LOD by projecting all sampling rays onto the
same face (arbitrarily chosen). This changes it to intersect the rays with the
cube and use the 3D distance between them.

Change-Id: If90b29cb4c13e6128ce6642eb28bb92602e783df
Reviewed-on: https://swiftshader-review.googlesource.com/5160
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Fixed a couple of regressions from namespace refactoring

From the ES3 spec, section 4.4.2 (about DeleteRenderbuffers):
"Unused names in renderbuffers are silently ignored, as is
 the value zero."

And from section 6.1.5:
"IsSampler will return TRUE if sampler is the name of a
 sampler object previously returned from a call to
 GenSamplers and FALSE otherwise".

Also, glIsSampler can use Context::isSampler(), which uses
ResourceManager::isSampler(), which should only look whether a
name has been reserved, not whether the object is allocated.

Note: Even though the spec mentions (about Sampler objects):
"they acquire state only when they are first used as a parameter
to BindSampler, SamplerParameter*, GetSamplerParameter*, or
IsSampler", it shouldn't hurt to not allocate the object when
calling IsSampler, since a subsequent call to any other Sampler
object related function should allocate it.

Change-Id: I69c9d8bbcf93231747b913c0afbd970c78d02cf1
Reviewed-on: https://swiftshader-review.googlesource.com/5161
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Fix signed/unsigned compiler warning.

Change-Id: Id82e8dba0d934f5c4bb2eefe1647839f25917898
Reviewed-on: https://swiftshader-review.googlesource.com/5150
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Add support for GL_NV_read_depth

Change-Id: If2f96b4cc1c09cd28771740f09be5f84875033ab
Reviewed-on: https://swiftshader-review.googlesource.com/5091
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Implement GL_EXT_draw_buffers.

Bug 19353282

Change-Id: I4a1782c2f1e9ae52b731ef447e97c353cc41044e
Reviewed-on: https://swiftshader-review.googlesource.com/5123
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fix draw buffers support.

Bug 19353282

Change-Id: I6d1022c42a3347b8deb01af15078769d794050cb
Reviewed-on: https://swiftshader-review.googlesource.com/5146
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Implement broadcasting of gl_FragColor.

Bug 19353282

Change-Id: I4319ad1836de36cc4b91b04ed226f925f82013ee
Reviewed-on: https://swiftshader-review.googlesource.com/5145
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fix support for variable number of render targets.

Bug 19353282

Change-Id: I4e99589477de32bb8004feec673e1dbddb675047
Reviewed-on: https://swiftshader-review.googlesource.com/5144
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Refactor implementation constants.

Bug 19353282

Change-Id: If2eb9f2d78c3a44b720bb1f223711411b576d710
Reviewed-on: https://swiftshader-review.googlesource.com/5140
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

RGB32F texture sampling fix

A cl recently introduced the XRB32F internal format, but while it
fixed some cases where this format is used as a rendertarget, it
seems to have caused regressions in sampling. A new case has been
added in the sampling code to handle this new format properly.

Change-Id: I7aa537a410d7b68c47771a72dec487e4b4c4e8be
Reviewed-on: https://swiftshader-review.googlesource.com/5147
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fixed bad assert

UInt <-> Int conversions are noop (bitwise), so it's allowed
to simply perform a move operation in that case.

Change-Id: I2078b2cf2933f5ced25b8ea81933e543a017faaf
Reviewed-on: https://swiftshader-review.googlesource.com/5143
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Allowed BGRA textures to be copied

BGRA8 texture support also applies to texture copy operations.

Change-Id: Ie3920585904c67ddf1b5b308eff60bc83f9e195b
Reviewed-on: https://swiftshader-review.googlesource.com/5142
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fixed loading UInt textures

Fixed a copy-paste error where only half
the required number of bytes were loaded.

Change-Id: I43ea2e1b5368137e19fb6bb20c03b5c9ca10ba3b
Reviewed-on: https://swiftshader-review.googlesource.com/5141
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Adding task data for transform feedback

Transform feedback requires a bit of extra data to write properly
into the transform feedback buffers. First it needs to know where
in the buffer to read, which can be derived from the vertex number
provided in vertexStart. Also, since SwiftShader always processes 3
vertices per primitive, regardless of the primitive type, transform
feedback needs to know which vertices to use, and that information
can be derived from verticesPerPrimitive.

Change-Id: I820d99949d7b2955794cc143ffb178e76dd418d7
Reviewed-on: https://swiftshader-review.googlesource.com/5062
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Added FORMAT_X32B32G32R32F as a renderable format

Added code to properly render to alphaless floating point formats.

Change-Id: I2e226fb787d8456f61a2946fb9c0d8a9dbb58243
Reviewed-on: https://swiftshader-review.googlesource.com/5128
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Validate renderability of texture formats.

Change-Id: I49c0f7b78a131c0d78c2cfb207bb3019b2b93a15
Reviewed-on: https://swiftshader-review.googlesource.com/5129
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Fix renderability test.

Half-float formats are renderable due to GL_EXT_color_buffer_half_float.

Change-Id: I4c3716f578cb4a5dd32f2b22265df4263e9834cc
Reviewed-on: https://swiftshader-review.googlesource.com/5127
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>